[PavlovsCat]

Someone might also google "audio editor", so why not also call it an audio editor to be on the safe side?

[nomel]

8-bit style voxel art can easily be made with this. In fact, that's the intended use case.

This would be a very poor tool for creating audio, and anyone looking for an audio tool would notice this immediately.

"8-bit voxel" is completely understood to the target audience. Anything involving audio would not.